﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace CalendarMod
{
    /// <summary>
    /// 按照步骤 1a 或 1b 操作，然后执行步骤 2 以在 XAML 文件中使用此自定义控件。
    ///
    /// 步骤 1a) 在当前项目中存在的 XAML 文件中使用该自定义控件。
    /// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
    /// 元素中:
    ///
    ///     xmlns:MyNamespace="clr-namespace:CalendarMod"
    ///
    ///
    /// 步骤 1b) 在其他项目中存在的 XAML 文件中使用该自定义控件。
    /// 将此 XmlNamespace 特性添加到要使用该特性的标记文件的根
    /// 元素中:
    ///
    ///     xmlns:MyNamespace="clr-namespace:CalendarMod;assembly=CalendarMod"
    ///
    /// 您还需要添加一个从 XAML 文件所在的项目到此项目的项目引用，
    /// 并重新生成以避免编译错误:
    ///
    ///     在解决方案资源管理器中右击目标项目，然后依次单击
    ///     “添加引用”->“项目”->[浏览查找并选择此项目]
    ///
    ///
    /// 步骤 2)
    /// 继续操作并在 XAML 文件中使用控件。
    ///
    ///     <MyNamespace:TimeLineControl/>
    ///
    /// </summary>
    [TemplatePart(Name = TimeLineControl.ElementDateTimeTextBox, Type = typeof(TextBlock))]
    [TemplatePart(Name = TimeLineControl.ElementContentTextBox, Type = typeof(TextBlock))]
    public class TimeLineControl : Control
    {
        private const string ElementDateTimeTextBox = "PART_DateTimeTextBox";
        private const string ElementContentTextBox = "PART_ContentTextBox";
        TextBlock dateTimeTB = null;
        TextBlock contentMsgTB = null;

        public TimeLineControl()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(TimeLineControl), new FrameworkPropertyMetadata(typeof(TimeLineControl)));
            ContentMsg = "Hello World";
            DateTimeMsg = "DateTime";
        }

        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            dateTimeTB = GetTemplateChild(ElementDateTimeTextBox) as TextBlock;
            contentMsgTB = GetTemplateChild(ElementContentTextBox) as TextBlock;
        }

        /// <summary>
        /// Registers a dependency property as backing store for the Content property
        /// </summary>
        public static readonly DependencyProperty ContentMsgProperty =
            DependencyProperty.Register("ContentMsg", typeof(object), typeof(TimeLineControl),
            new FrameworkPropertyMetadata(null,
                  FrameworkPropertyMetadataOptions.AffectsRender |
                  FrameworkPropertyMetadataOptions.AffectsParentMeasure));

        /// <summary>
        /// Gets or sets the Content.
        /// </summary>
        /// <value>The Content.</value>
        public object ContentMsg
        {
            get { return (object)GetValue(ContentMsgProperty); }
            set { SetValue(ContentMsgProperty, value); }
        }

        public static readonly DependencyProperty DateTimeMsgProperty =
            DependencyProperty.Register("DateTimeMsg", typeof(object), typeof(TimeLineControl),
            new FrameworkPropertyMetadata(null,
                  FrameworkPropertyMetadataOptions.AffectsRender |
                  FrameworkPropertyMetadataOptions.AffectsParentMeasure));
        public object DateTimeMsg
        {
            get
            {
                return (object)GetValue(DateTimeMsgProperty);
            }
            set
            {
                SetValue(DateTimeMsgProperty, value);
            }
        }
    }
}
